Electronic earmuff



FIG. 1 is a perspective view of an electronic earmuff showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawings depict portions of the electronic earmuff that form no part of the claimed design. 

CLAIM The ornamental design for an electronic earmuff, as shown and described. 